Investigation on the near-infrared-emitting thermal stability of Bi activated alkaline-earth aluminoborosilicate glasses

2015 ◽  
Vol 117 (5) ◽  
pp. 053107 ◽  
Author(s):  
Ronghua Wan ◽  
Zhiguo Song ◽  
Yongjin Li ◽  
Yuting Zhou ◽  
Qun Liu ◽  
...  
2010 ◽  
Vol 39 (1) ◽  
pp. 93-102 ◽  
Author(s):  
A. Selmi ◽  
C. Galven ◽  
G. Corbel ◽  
P. Lacorre

2013 ◽  
Vol 21 (23) ◽  
pp. 27835 ◽  
Author(s):  
Qiangbing Guo ◽  
Beibei Xu ◽  
Dezhi Tan ◽  
Juechen Wang ◽  
Shuhong Zheng ◽  
...  

The fundamental connexion between thermoluminescence, phosphorescence and electron traps in solids has been investigated. Thermoluminescence and long-period phosphorescence arise from the release of electrons from metastable levels or traps. By studying the thermal stability of trapped electrons and the probability of release from traps of different depths, methods have been developed for finding the depths of electron traps in phosphors. The main experiment consists in exciting the phosphor at low temperatures until all the traps are filled; the phosphor is then warmed at a steady rate and the light emitted while warming is measured as a function of the temperature. The results show that the trap distribution in impurity phosphors such as willemite and the alkaline earth sulphides are, in general, complex, and extend over a range often as wide as 0·2-1·0 eV. The probability of release of an electron from a trap of depth E at temperature T is of the form se -E/kT , where is a constant. Values of s for alkaline earth and zinc sulphides are in the neighbourhood of 10 8 ±1 sec. -1 .


2011 ◽  
Vol 399-401 ◽  
pp. 930-934
Author(s):  
Ying Gang Zhao ◽  
Dong Mei Shi ◽  
Jin Liu ◽  
Xiao Feng Wang

Spectroscopic properties and energy transfer (ET) in Er3+/Eu3+-doped Ga2O3-GeO2 glass have been investigated. Effects of alkali metal and alkaline earth metals ions on thermal stability of Er3+-doped gallate-germanium glass have been investigated. Simultaneously influences of Eu3+ codoping on the optical properties of Er3+-doped Ga2O3-GeO2-Na2O (GN) glass have been investigated and the possible ET mechanisms involved have also been discussed. Significant enhancement of the 1.53 µm emission intensity and decrease of upconversion (UC) fluorescence with increasing Eu3+ concentration have been observed. The results indicate that the incorporation of Eu3+ into Er3+-doped GN glass can effectively improve 1.53-μm and lower UC luminescence, which makes GN glass more attractive for their use in C-band optical fiber amplifiers.


2019 ◽  
Vol 12 ◽  
pp. 357-360 ◽  
Author(s):  
Jing-Yi Chen ◽  
Jing-Yan Lv ◽  
Zhong-Yue Wang ◽  
She-Bao Lin ◽  
Hai-Tao Guo ◽  
...  

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